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//-----------------------------------------------------------------------------
/** @file libboardgame_base/RandomGenerator.cpp
@author Markus Enzenberger
@copyright GNU General Public License version 3 or later */
//-----------------------------------------------------------------------------
#include "RandomGenerator.h"
#include <list>
namespace libboardgame_base {
//-----------------------------------------------------------------------------
namespace {
bool is_seed_set = false;
RandomGenerator::ResultType the_seed;
list<RandomGenerator*>& get_all_generators()
{
static list<RandomGenerator*> all_generators;
return all_generators;
}
RandomGenerator::ResultType get_nondet_seed()
{
random_device generator;
return generator();
}
} // namespace
//-----------------------------------------------------------------------------
RandomGenerator::RandomGenerator()
{
set_seed(is_seed_set ? the_seed : get_nondet_seed());
get_all_generators().push_back(this);
}
RandomGenerator::~RandomGenerator()
{
get_all_generators().remove(this);
}
bool RandomGenerator::has_global_seed()
{
return is_seed_set;
}
void RandomGenerator::set_global_seed(ResultType seed)
{
is_seed_set = true;
the_seed = seed;
for (RandomGenerator* i : get_all_generators())
i->set_seed(the_seed);
}
void RandomGenerator::set_global_seed_last()
{
if (is_seed_set)
for (RandomGenerator* i : get_all_generators())
i->set_seed(the_seed);
}
//-----------------------------------------------------------------------------
} // namespace libboardgame_base
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